Sand molding machine



(No Model.) 2 Sheets-Sheet 1.

C. S. SNEAD. SAND MOLDING MACHINE.

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(No Model.) '2 Sheets-Sheet 2.

C. S. SNEAD. SAND MOLDING MACHINE.

No. 475x523. Patented May 24, 1892.

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UNITED STATES ATnNT frricno CHARLES S. SNEAD, OF LOUISVILLE, KENTUCKY, ASSIGNOR TO THE SNEAD -dr OO. IRON VORKS,A OF SAME PLACE.

SAND-MOLDING MACHINE.

SPECIFICATION forming part f Letters Patent N0. 475,523, dated May 24;, 1892.

Application filed May 16, 1891. Serial No. 393,038. (No model.)

To all whom it may concern/.-

Be it known that I, CHARLES S. SNEAD, of Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Sand-Molding Machinos; and I do hereby declare the following to be afull, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make and use :o the same.

My invention relates to an improvement in sand-moldin g machines, and more particularly to means for removing the pattern from the sand after the latter has been firmly compressed about the pattern; and it consists in a frame for supporting the sections of a flask, a follow -board to which the pattern is secured, means for elevating and lowering the follow-board and for guiding it in its move- 2o ments, and means for taking up the Wear of the parts.

In the accompanying drawings, Figure lis a view in side elevation of the frame. Fig. 2 is an end view. Fig. 3 is a view in transverse 2 5 section on line o c of Fig. 4. Fig. 4 is a longitudinal sectional view on the line a a. of Fig. 3; Fig. 5 is a similar view on the line b b of Fig. 3. Fig. 6 is a View similar to Fig. 4, showing the follow-board lowered. Fig. 7 is a view 3o of a modified form of bearing for the cam, and Fig. S shows the mechanism for limiting the movement of the follow-board.

The great difficulty encountered in producing in sand or other material strictly perfect 3 5 molds has been in the removal of the pattern from its matrix without disturbing or distorting the mold. This is due to the almost certain unsteadiness of the hand, which by any side or endwise movement or by the pattern 4o being drawn one end or one side faster than the other causes abreaking down of the mold. With my improved machine the pattern is actuated orwithdrawn solelyby devices Which under all conditions and circumstances move away from the sand in a direction at right angles to the face of the mold,and as the pattern is guided in its movements it is of course held against end or sidewise movement and breaking down of the mold prevented.

5o D represents a rectangular open frame, its internal dimensions being preferably slightly longer than the flask and somewhat narrower than the flask, so that the latter, or rather the cope or drag, will be supported at its side edges on said frame. The ends of the frame, which is preferably of metal` are slightly lower than the side edges to form seats or depressions for the blocks H, which are provided with smooth inner faces and are adjusted to snugly it against the ends of the 6o follow-board or platform B and guide the latter and hold it positively against endwise movement until it has Withdrawn the pattern from the san d. These blocks H are removably secured in place by the bolts 7c, which pass 65 through flanges in the ends of the frame D, and are held in place by nuts.

S are horizontal shafts passing transversely through the frame and provided with angular outer ends for the reception of the head of 7o lever L, by which they are rocked. Each shaft is provided with a crank-arm O, and the latter are connected by the pitman P, so that when one shaft is rocked the other is rocked an equal distance in the samedireotion. Each shaft is also provided with two or more, preferably three, cams E, all of which are arranged in proper position relative to each other to raise or lower the boards or platform B toward and away from the cope or drag. 8o

In the drawings I have shown three cams on each shaft, each cam bearing against a wearing-plate M, secured to the under side of the board B by two screws O, and each plate being provided with a set screw N, by which the plate can be adjusted to compensate for any wear and the board or platform accurately adjusted with relation to the frame. The center cams on each shaft are preferably surrounded by the yokes I, integral with or 9o rigidly secured to the wearing-plates M. These yokes are intended to produce more positive downward movement of the follow-board.

T is a plate adjustably secured by means of segmental slots R and boltsRto the inner face of the side of the frame D, with its slots concentric to shaft S. This plateis provided with two stops Q, and the shaft is provided with an arm G, which latter moves between the stops, and consequently limits the moveroo ments of the shafts and the board B, carried by the cams on said shafts. The board B is provided on its under side with longitudinal 'strengthening-ribs Y.

I prefer to have one frame such as described for the cope and one for the drag, the only dierence being that for the cope the board B instead of being provided with pins A', as shown, is provided with holes for the pins in the cope.

In using the device a section of the pattern is secured to the board B, and if it be the copesection the sprue-pattern is also secured to said board. The cope or drag is then placed in position on the frame D and sand is rammed in in the usual Way until the Section is filled.'

Then by turning lever L until it is stopped by I claim as new, and desire to secure by Letters I Patent, `is

l.' The combination, with a frame having depressions or seats at its ends, of blocks re-A movably secured in said seats or depressions, a movable board or platform located within the frame, the ends of the board or platform being in close proximity toH the blocks, and

means for elevating and lowering the said board or platform.

2. The combination, with an open frame and a movable board located in position to move in and out of the frame, of removable blocks connected with the ends of the frame and adapted to limit the endwise movement The flask-section of the board, and means for raising and1oW ering the board, substantially as set forth.

3. The combination, with a frame and a board located in position to move in and out of the frame, of blocks connected with the ends of the frame and adapted to limit the endwise movement of the board, rocking shafts having cams thereon, saidshafls connected to move in unison, adjustable Wearingplates 011 the board, and' strengthening-ribs on the inner "face of the board adapted to bear on the shafts when the board is lowered, substantiallyas set forth.

4. The combination, with a rectangular frame for supporting a cope or drag, the said frame having removable bearing-blocks at its ends, shafts journaled in said frame and coupled up to move in unison, cams on the shafts, means for limiting the movements of the shafts, and cams rigidly mounted on said shafts, of a board Vor platform resting ou and carried by said cams,substantially as set forth.

5. The combination, with a frame, shafts therein, means connecting said shafts, whereby they are caused to move in unison, cams on said shafts, and an arm on one of said shafts, of a board or platform resting on the cams and a plate adjustably secured to the frame and provided with stops adapted to engage the arm on the shaft, substantially as set forth.

In testimony whereof l have signed this specification in the presence of two subscribing Witnesses.

CHARLES S. SNEAD.

Witnesses:

WILLIAM R. SNEAD, N. J. JOHNSTON. 

